William Petre (disambiguation)
William Petre is the name of the following people:
- William Petre (1505 / 1506–1572), English politician and royal secretary
- William Petre, 2nd Baron Petre (1575–1637), English nobleman and politician
- William Petre, 4th Baron Petre (1626–1684), English nobleman and politician
- William Petre, 11th Baron Petre (1793–1850), British nobleman and politician
- William Petre, 12th Baron Petre (1817–1884), British nobleman and politician
- William Petre, 13th Baron Petre (1847-1893), British nobleman and politician
